Best processor possible for the Dell Latitude D630?

Hello! I have a Latitude D630 that I've spent a lot of time upgrading and servicing as a side project. I was wondering the upgrade path from where I am. I have a Core 2 Duo and would like to go further down the CPU route. It is a Socket P (478) Motherboard.

When I upgraded my d630 processor a few years ago I read a lot of controversial discussions about the X9000’s higher wattage, and therefore possible higher temps. I do remember at least one person that said he had tried one without any problems, but he listed no info to back it up..

So, before I installed my X9000, I recorded before power consumption and temperatures (under various conditions(for my T9300), including max CPU usage for extended periods of time), then I installed my X9000 and collected the same data. The results(watts/heat) were almost exactly the same (T9300 vs X9000), and the X9000 made significant difference in performance.

I have had the X9000 running in my d630 for a few years now, and this laptop is still used daily for email, web browsing, and YouTube. Relatively speaking, it works fantastic, for 2007 technology based laptop.

What also really makes these d630’s hum is adding a SSD drive, and 4 to 8GB of Ram.

BTW: As far as I know, the X9100 will not POST(not work) in the d630. I remember reading that others had tried this with no luck. The X9100 is a 1066MHZ CPU, whereas the X9000 is an 800MHZ CPU. The d630 can only handle 800MHZ CPU, and therefore the X9000 is the fastest CPU it can use.

Also: You will need to flash you BIOS to at least version A17 (A19 is the highest)